{"instruction": "You are an expert in relationship extraction. Please extract relationship triples that match the schema definition from the input. Return an empty list for relationships that do not exist. Please respond in the format of a JSON string.", "schema": ["component whole", "cause effect", "product producer", "instrument agency"], "input": "the corporation has constructed railways in ukraine , guinea , iran , iraq , and syria ."}
{"component whole": [], "cause effect": [], "product producer": [{"subject": "corporation", "object": "railways"}], "instrument agency": []}